[BBLISA] State of spam filtering?

[Jim Hickstein]

On 2013/05/21 08:30, Edward Ned Harvey (bblisa4) wrote:
> Definitely use SPF.  But it's only one ingredient in an overall solution.  Because a lot of senders who implement SPF will use a soft ~ or as mentioned, a lot of senders have no SPF at all.

And a few have a +all, which is postively anti-social: the spammers are 
starting to use those domains in the envelope.  Don't stop with SPF, use 
DMARC as well.  It closes this loophole in SPF, and adds an enforcement 
mechanism to DKIM.